If it helps, just play mind games with yourself. I always wonder who might have touched the food before I got in there. If it is homemade, I wonder if their kids might have sneezed on it, or if a cat licked it....

I know, kind of stupid. But it works.

My ex step-sister sells baked goods at the farmers market in town here. I know (saw it with my own eyes several times) that she lets her dog lick the spoons and bowls then just rinses them off. Her baked goods look pretty but I tell people not to buy them! EEEWWWWW